Hello, I have replied @vinci-boy via personal message but thought I should paste my response here also. My apologies for replying in English but I can't speak French.
Hello. I'm sorry but I do not give permission for you to use my images. I created all of the backgrounds, icons, and logos etc. from scratch which took many months of work. My wishes are clearly stated in the the readme found with the theme from which you took the images (my license is below).
This theme is being actively developed, a great deal of work has been put into the theme and art so please do not use the graphics I have created in other projects.
You are free to modify the theme for your personal use only - please do not share modified versions of this theme.
Commercial distribution is prohibited